Puivebizeb



J. SHELTON,

PULVERIZER.

Mmc/mow FILED ocT. 31, |911.

Patented July 29, 1919.

maar se HARRY J. SHELTON, 0F ST. LOUIS, MISSOURI.

PULVERIZER.

Specification of Letters Patent.

Patented Jury es, aero.

Application filed October 31, 1917. Serial No. 199,594.

To all whom 1f/may concern:

Be it known that I, HARRY J. SHELTON, a citizen .of the United States of America, and a resident of the city of St. Louis and State of Missouri, have invented certain new and useful Improvements in Pulverizers, of which the following is a specification.

The primary object of this invention is to provide an improvement in the securing of the discharge screen in the pulverizer.

Another object is to provide an improvement in the construction of a pulverizer so that the discharge screen can be removed from the pulverizer without dis-assembling the pulverizer.

A further object is in providing an improved mounting or support for the discharge screen of a pulverizer so as to provide for the quick interchange of discharge screens.

Other and further objects will appear in the specification and be specifically pointed out in the appended claims, reference being had to the accompanying drawings exemplifying the invention, and in which:

Figure 1 is a longitudinal sectional view taken through a pulverizer, showing the discharge screen mounted in accordance with the invention.

Fig. 2 is a fragmentary, transverse section taken on the line II-II of Fig. l.

Referring to the drawings, 1 designates the housing, andA horizontally arranged in said housing is a driven shaft 2, and secured to said shaft are a pair of balance wheels 3. Supported by said balance wheels on disks 3 are a plurality of horizontally arranged hammer supports 4, and mounted on each of said supports 4 are a plurality of hammers 5. Formed on top of the housing 1 is a receiving chute 6, said chute lead-V ing to the hammer chamber 7 Formed in each of the side walls 8 is a circularly formed recess 9, each of said recesses at one end having a straightway portion 10. l

In the construction of the pulverizer shown in the drawing, the housing 1 is cast in one piece excepting the` demountable side plate 11 which is provided for the purpose of mounting the balance'wheels 3 and the hammers 5 supported thereby.

This invention, therefore pertains to the supporting or mounting of the discharge screen 12 which is seated in the recesses or grooves 9. In mounting the discharge screen 12, the side edges 13 are introduced into the straightway portions 10 of the recesses 9 and forced or fed along said recesses until theforward end of the screen engages the breaker plate 14.

Before the introduction of the screen 12 into the recesses 9, an opening 15 is provided between the end wall 16 and the curved top wall 17 of the housing 1. After the screen 12 has been properly seated in the recesses 9 as related, a retaining plate 18 is then clampedby screws 19 over the opening 15, said plate serving to prevent said screen 12 from moving rearwardlyl In order to provide for the proper seating of the intermediate portion of the forward end 20 of the screen 12 when mount ing the same, an upwardly inclined face 21 is formed on the end wall 22, said face 21 being arranged transversely of said wall.

In fitting the screen 12 in the recesses 9, it so happens that the intermediate port-ion of the forward end 20 of the screen sometimes buckles, and when the buckled end travels adjacent the inclined face 21, said buckled end will engage said face and Ybe somewhat straightened and forced into position against the breaker plate 14.

For reinforcing the screen 12 when the hammers 5 are in operation on tqhe material introduced into the chambers 7, transversely arranged rods 23 are mounted in the side walls 8 adjacent the under side of the screen.

lVhen first introducing the forward end 20 of the screen plate 12 through the opening 15 it is to be noted that the forward end portion will irst'engage and traverse the straightway portions 10 of the recesses 9. These straightway portions 1() are for the purpose of assisting the introduction of the screen plate and for preventing the binding of the screen plate at the initial point of insertion.

In the use of pulverizers and the like, it is often desired to interchange the screen plate in accordance with the size or quality of the material to be discharged through the screen plate. Therefore it is necessary to introduce a screen plate having the required size of mesh or perforations.

In this connection attention is called to the simple manner in which this improved screen plate 12 can be removed from `the securing recesses 9 for the introduction of work and labor required relative to assembling pulverizers of this character.

What I claim is:

1. A pulverizer having a casing formed vwith side and end portions, said side portions having curved recesses in their inner faces and one of said end portions having a projecting portion with an upwardly inclined face, a breaker plate secured to said end portion and av screen guided in said curved lrecesses and abutting against said breaker plate and projecting portlon.

2. In a pulveri'zer, a housing having a pair of oppositely disposed side portions, vav

top Wall, and an end Wall formed integral, each of said side portions having a curved recess formed therein, said recesses being oppositely disposed, a one piece screen plate slidably mounted in said recesses, said housin having an opening the approximate Wilth of said screen plate formed between said vtop wall and said end wall for the reception of said screen plate, and a member removably mounted oversaid opening.

HARRY J. SHELTON. 

